# SageMath code for working with number field 42.0.409216671487706896433400972530400813921910324685198934110144125610159603082437813389667.1
# Some of these functions may take a long time to execute (this depends on the field).
# Define the number field:
x = polygen(QQ); K. = NumberField(x^42 - x^41 + 20*x^40 - 25*x^39 - 8*x^38 - 138*x^37 - 2077*x^36 + 839*x^35 - 7305*x^34 + 8805*x^33 + 67596*x^32 - 12107*x^31 + 444232*x^30 - 141646*x^29 + 238560*x^28 + 2150502*x^27 - 3285732*x^26 + 14361861*x^25 - 708679*x^24 + 4004385*x^23 + 63920534*x^22 - 73366557*x^21 + 232544983*x^20 + 114300646*x^19 + 134380032*x^18 + 644451241*x^17 - 110366019*x^16 + 50739485*x^15 + 3000292231*x^14 - 3874326960*x^13 + 7531027885*x^12 - 11845394651*x^11 + 8115584321*x^10 - 10398559445*x^9 + 11442787794*x^8 - 3901741530*x^7 + 3575301015*x^6 - 3614499453*x^5 - 715331685*x^4 + 331663193*x^3 + 2507361126*x^2 - 1452650295*x + 649728353)
# Defining polynomial:
K.defining_polynomial()
# Degree over Q:
K.degree()
# Signature:
K.signature()
# Discriminant:
K.disc()
# Ramified primes:
K.disc().support()
# Autmorphisms:
K.automorphisms()
# Integral basis:
K.integral_basis()
# Class group:
K.class_group().invariants()
# Unit group:
UK = K.unit_group()
# Unit rank:
UK.rank()
# Generator for roots of unity:
UK.torsion_generator()
# Fundamental units:
UK.fundamental_units()
# Regulator:
K.regulator()
# Analytic class number formula:
# self-contained SageMath code snippet to compute the analytic class number formula
x = polygen(QQ); K. = NumberField(x^42 - x^41 + 20*x^40 - 25*x^39 - 8*x^38 - 138*x^37 - 2077*x^36 + 839*x^35 - 7305*x^34 + 8805*x^33 + 67596*x^32 - 12107*x^31 + 444232*x^30 - 141646*x^29 + 238560*x^28 + 2150502*x^27 - 3285732*x^26 + 14361861*x^25 - 708679*x^24 + 4004385*x^23 + 63920534*x^22 - 73366557*x^21 + 232544983*x^20 + 114300646*x^19 + 134380032*x^18 + 644451241*x^17 - 110366019*x^16 + 50739485*x^15 + 3000292231*x^14 - 3874326960*x^13 + 7531027885*x^12 - 11845394651*x^11 + 8115584321*x^10 - 10398559445*x^9 + 11442787794*x^8 - 3901741530*x^7 + 3575301015*x^6 - 3614499453*x^5 - 715331685*x^4 + 331663193*x^3 + 2507361126*x^2 - 1452650295*x + 649728353)
DK = K.disc(); r1,r2 = K.signature(); RK = K.regulator(); RR = RK.parent()
hK = K.class_number(); wK = K.unit_group().torsion_generator().order();
2^r1 * (2*RR(pi))^r2 * RK * hK / (wK * RR(sqrt(abs(DK))))
# Intermediate fields:
K.subfields()[1:-1]
# Galois group:
K.galois_group(type='pari')
# Frobenius cycle types:
# to obtain a list of $[e_i,f_i]$ for the factorization of the ideal $p\mathcal{O}_K$ for $p=7$ in Sage:
p = 7; [(e, pr.norm().valuation(p)) for pr,e in K.factor(p)]